The Okamura family is a popular designer whose father is so busy that he rarely has days off and is often away from home. One day, the eldest son, Koji, attacks his mother, Mayuko, and tries to rape her. Confused, Mayuko accepts Koji, but that was a mistake. Koji's desire knows no bounds and grows more intense with each passing day, making it impossible for him to escape the quagmire. Mayuko seeks advice from her second son, Satoshi, to do something about the situation, but...